Fix used-before-assignment for functions/classes defined in type checking guard

[Rogdham]

Type of Changes

	Type
✓	🐛 Bug fix

Description

Closes #7368

This PR fixes the following false-positive:

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from typing_extensions import assert_type
else:

    def assert_type(val, _):
        return val

ANSWER = 42
assert_type(ANSWER, int)  # E0601: Using variable 'assert_type' before assignment (used-before-assignment)

The issue comes from definitions in the else block of a if type-guard.

In 3159b17 the case was already handled for assignments, I had only added cases for function and class that are defined in the else part.

[coveralls]

Pull Request Test Coverage Report for Build 2939756418

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0005%) to 95.318%

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Totals
Change from base Build 2939490288:	0.0005%
Covered Lines:	16937
Relevant Lines:	17769

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💛 - Coveralls

[jacobtylerwalls]

Looks great. Congrats on becoming a pylint contributor!

[github-actions]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit a469ec8